1209830 has 16 divisors (see below), whose sum is σ = 2190240. Its totient is φ = 481152.

The previous prime is 1209821. The next prime is 1209841. The reversal of 1209830 is 389021.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1209796 and 1209805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3191 + ... + 3549.

It is an arithmetic number, because the mean of its divisors is an integer number (136890).

2^1209830 is an apocalyptic number.

1209830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1209830 is a deficient number, since it is larger than the sum of its proper divisors (980410).

1209830 is a wasteful number, since it uses less digits than its factorization.

1209830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1209830 is about 1099.9227245584. The cubic root of 1209830 is about 106.5552330192. Note that the first 3 decimals are identical.

The spelling of 1209830 in words is "one million, two hundred nine thousand, eight hundred thirty".